Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.41 g/cc | 0.0509 lb/in³ | ISO 1183 | ||
Density of Compound | 1.20 g/cc | 0.0434 lb/in³ | melt; Internal | ||
Water Absorption | 0.65 % | 0.65 % | ISO 62 | ||
Linear Mold Shrinkage, Flow | 0.021 cm/cm | 0.021 in/in | ISO 294-4 | ||
Linear Mold Shrinkage, Transverse | 0.018 cm/cm | 0.018 in/in | ISO 294-4 | ||
Melt Flow | 2.5 g/10 min @Load 2.16 kg, Temperature 190 °C |
2.5 g/10 min @Load 4.76 lb, Temperature 374 °F |
(MVR) cm³/10min; ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Tensile Strength, Yield | 62.0 MPa | 8990 psi | 50mm/min; ISO 527-2/1A | ||
Elongation at Break | 32 % | 32 % | 50mm/min; ISO 527-2/1A | ||
Elongation at Yield | 9.0 % | 9.0 % | 50mm/min; ISO 527-2/1A | ||
Tensile Modulus | 2.60 GPa | 377 ksi | 1mm/min; ISO 527-2/1A | ||
Flexural Modulus | 2.50 GPa | 363 ksi | ISO 178 | ||
Charpy Impact Unnotched | 22.0 J/cm² | 105 ft-lb/in² | partial; ISO 179/1eU | ||
20.0 J/cm² @Temperature -30.0 °C |
95.2 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eU | |||
Charpy Impact, Notched | 0.850 J/cm² | 4.04 ft-lb/in² | ISO 179/1eA | ||
0.700 J/cm² @Temperature -30.0 °C |
3.33 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | |||
Tensile Creep Modulus, 1 hour | 2300 MPa | 334000 psi | ISO 899-1 | ||
Tensile Creep Modulus, 1000 hours | 1100 MPa | 160000 psi | ISO 899-1 | ||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | 1.00e+14 ohm-cm | 1.00e+14 ohm-cm | IEC 60093 | ||
Surface Resistance | 1.00e+14 ohm | 1.00e+14 ohm | IEC 60093 | ||
Dielectric Constant | 4.0 @Frequency 100 Hz |
4.0 @Frequency 100 Hz |
IEC 60250 | ||
4.0 @Frequency 1.00e+6 Hz |
4.0 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Dielectric Strength | 35.0 kV/mm | 889 kV/in | IEC 60243-1 | ||
Dissipation Factor | 0.0015 @Frequency 100 Hz |
0.0015 @Frequency 100 Hz |
IEC 60250 | ||
0.0050 @Frequency 1.00e+6 Hz |
0.0050 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Comparative Tracking Index | 600 V | 600 V | IEC 60112 | ||
Thermal Properties | Metric | English | Comments | ||
CTE, linear | 110 µm/m-°C | 61.1 µin/in-°F | ISO 11359-2 | ||
Specific Heat Capacity | 2.21 J/g-°C | 0.528 BTU/lb-°F | Internal | ||
Thermal Conductivity | 0.155 W/m-K | 1.08 BTU-in/hr-ft²-°F | Internal | ||
Melting Point | 165 °C | 329 °F | 10°C/min; ISO 11357-1,-2,-3 | ||
Deflection Temperature at 1.8 MPa (264 psi) | 101 °C | 214 °F | ISO 75-1, -2 | ||
Flammability, UL94 | HB @Thickness 1.60 mm |
HB @Thickness 0.0630 in |
UL94 | ||
HB @Thickness 3.00 mm |
HB @Thickness 0.118 in |
UL94 | |||
Flame Spread | <= 75 mm/min | <= 3.0 in/min | ISO 3795 and FMVSS 302 | ||
Processing Properties | Metric | English | Comments | ||
Processing Temperature | 20.0 - 30.0 °C | 68.0 - 86.0 °F | |||
80.0 - 120 °C | 176 - 248 °F | Cavity temperature | |||
165 °C | 329 °F | Ejection temperature; Internal | |||
Feed Temperature | 60.0 - 80.0 °C | 140 - 176 °F | |||
Zone 1 | 170 - 180 °C | 338 - 356 °F | |||
Zone 2 | 180 - 190 °C | 356 - 374 °F | |||
Zone 3 | 190 - 200 °C | 374 - 392 °F | |||
Zone 4 | 190 - 210 °C | 374 - 410 °F | |||
Die Temperature | 190 - 210 °C | 374 - 410 °F | |||
Melt Temperature | 180 - 190 °C | 356 - 374 °F | |||
190 - 210 °C | 374 - 410 °F | ||||
Mold Temperature | 60.0 - 100 °C | 140 - 212 °F | |||
80.0 - 120 °C | 176 - 248 °F | ||||
Drying Temperature | 120 - 140 °C | 248 - 284 °F | |||
Dry Time | 3.00 - 4.00 hour | 3.00 - 4.00 hour | |||
Moisture Content | 0.15 % | 0.15 % | Necessary low maximum residual | ||
Injection Pressure | 60.0 - 120 MPa | 8700 - 17400 psi | |||
Hold Pressure | 60.0 - 120 MPa | 8700 - 17400 psi | |||
Back Pressure | 4.00 MPa | 580 psi | |||
Screw Speed | 70 rpm @Diameter 55.0 mm |
70 rpm @Diameter 2.17 in |
|||
100 rpm @Diameter 40.0 mm |
100 rpm @Diameter 1.57 in |
||||
150 rpm @Diameter 25.0 mm |
150 rpm @Diameter 0.984 in |
||||
Hot-Working Temperature | 190 - 210 °C | 374 - 410 °F | |||
De |
|||||
Injection molding | Yes | ||||
Injection speed | slow-medium | ||||
Longer pre-drying times/storage | Can be stored in standard conditions until processed. | ||||
Pre-drying | Drying is not normally required with proper storage | ||||
Processing conditions | 9988 | ||||
Processing Notes | screws (minimum 25 D) will fit. | ||||
screws (minimum 25 D) will fit. | |||||
screws (minimum 25 D) will fit. | |||||
screws (minimum 25 D) will fit. | |||||
Profile extrusion | Yes | ||||
Sheet extrusion | Yes |
POM 的简介
聚甲醛是一种表面光滑,有光泽的硬而致密的材料,淡黄或白色,可在-40- 100°C温度范围内长期使用。它的耐磨性和自润滑性也比绝大多数工程塑料优越,又有良好的耐油,耐过氧化物性能。很不耐酸,不耐强碱和不耐紫外线的辐射。
POM 物理性质
聚甲醛的拉伸强度达70MPa,吸水性小,尺寸稳定,有光泽,这些性能都比尼龙好,聚甲醛为高度结晶的树脂,在热塑性树脂中是最坚韧的。具抗热强度,弯曲强度,耐疲劳性强度均高,耐磨性和电性能优良。
POM 聚甲醛的性能:
性 能 数 值
比重 1.43
熔点 175°C
伸强度(屈服) 70MPa
伸长率(屈服) 15%
(断裂) 15%
冲击强度(无缺口) 108KJ/m2
(带缺口) 7.6KJ/m2
应用范围
POM属结晶性塑料,熔点明显,一旦达到熔点,熔体粘度迅速下降。当温度超过一定限度或熔体受热时间过长,会引起分解。
POM具有较好的综合性能,在热塑性塑料中是最坚硬的,是塑料材料中力学性能最接近金属的品种之一,其抗张强度、弯曲强度、耐疲劳强度,耐磨性和电性都十分优良,可在-40度--100度之间长期使用。
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